Large discharge door device with self-locking function

Abstract

The invention discloses a large discharge door device with a self-locking function. The large discharge door device comprises a stirrer cylinder body, a discharge door fixing flange, a plugging device and a self-locking device. According to the large discharging door device with the self-locking function, the bottom of the discharging door is supported in an auxiliary mode through the self-locking device, the pressure bearing capacity when the discharging door is closed and the capacity for bearing vibration and material impact of stirring equipment are improved, the discharging door is prevented from deforming, the using stability of the equipment is improved, and the service life of the equipment is prolonged; the discharging door is automatically opened and closed, the opening and closing efficiency and the opening and closing stability are improved compared with a manual operation mode, after the discharging door is closed, the discharging door is locked through the self-locking device, and if the discharging door needs to be opened, the self-locking device needs to be controlled to release the locking state, so that the situation that the discharging door is directly opened due to manual misoperation can be prevented, and the working efficiency is improved. And the use safety is improved.

Description

Technical Field

[0001] This invention relates to the field of dry powder mixing equipment technology, specifically to a large unloading gate device with self-locking. Background Technology

[0002] In the production application of dry powder mixing equipment, the discharge gate is a key component for material output. Its closing sealing and locking reliability directly affect the safety of the mixing operation, material utilization rate, and production efficiency. Currently, most dry powder mixer discharge gates on the market lack self-locking devices or use manual pins or simple cylinders to achieve closing and locking. Such structures have the following technical defects: 1. Poor locking reliability: Traditional manual locking structures rely on the operator's manual operation precision. Due to operational negligence (such as the pin not being inserted tightly or the bolt not being tightened), the discharge door may cause dry powder material to leak during the mixing process due to equipment vibration. This not only wastes raw materials but also pollutes the production environment. At the same time, there is a risk to personnel safety caused by material splashing. 2. Lack of self-locking anti-accidental touch operation mechanism: The existing structure does not have automatic locking and anti-accidental triggering design. During equipment operation, if personnel accidentally touch the unloading door control components (such as manual levers or cylinder control valves), it is easy to cause the unloading door to open, disrupting the continuity of mixing operations, or even causing equipment shutdown failures and increasing production and maintenance costs. 3. Insufficient adaptability and stability: For large dry powder mixers, the discharge door bears a large discharge pressure. The strength of ordinary locking structures is limited. Long-term use is prone to component wear and deformation, leading to locking failure. At the same time, traditional structures are poorly adapted to the vibration and material impact of mixing equipment. The locking state is easily affected by external factors and cannot meet the requirements of long-term stable operation. 4. Cumbersome and inefficient operation: The manual locking method requires the operator to manually tighten / remove the pins and bolts after the equipment is stopped. The operation steps are cumbersome and time-consuming, which seriously affects production efficiency, especially in mass production. The simple cylinder clamping mechanism requires a continuous supply of air pressure, which consumes a lot of energy, and the unstable air pressure can easily lead to locking failure.

[0003] Some improved solutions using mechanical linkage self-locking mechanisms have also emerged in the existing technology. For example, patent CN2007200073756 discloses a forced mixer with a self-locking unloading gate mechanism. It drives the unloading gate through a crank arm linkage mechanism and uses the geometric relationship of the mechanism passing the "dead point" in the closed position to achieve self-locking. However, its self-locking force still needs to be borne by the driving component (cylinder / hydraulic cylinder). Under long-term load, there is a risk of fatigue and attenuation of locking force. At the same time, the self-locking depends on the accuracy of the hinge point and has limited stability under vibration.

[0004] As dry powder equipment develops towards larger scale, automation, and higher efficiency, the market has placed higher demands on the locking safety, reliability, and ease of operation of discharge gates. In summary, whether it's traditional manual or pneumatic locking, or the aforementioned improved linkage self-locking mechanism, existing discharge gate locking mechanisms can no longer meet the demands of modern production for equipment safety, operational efficiency, and stability. Therefore, developing a simple, reliable, and adaptable self-locking device for the discharge gate of dry powder mixers has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a large unloading gate device with self-locking, which solves the problems of insufficient locking reliability, lack of anti-accidental contact mechanism, easy failure under long-term pressure, and cumbersome and inefficient operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a large unloading gate device with self-locking, comprising a mixer cylinder and an unloading gate fixing flange, wherein the unloading gate fixing flange is fixedly installed at the bottom of the mixer cylinder, a sealing device is installed inside the unloading gate fixing flange, and a self-locking device is provided on the side of the sealing device; The sealing device includes a discharge gate rotating shaft, a discharge gate, a support rod, a discharge gate fixing plate, and an opening and closing power device. The discharge gate rotating shaft is mounted on the inner wall of the discharge gate fixing flange via a rotating shaft support seat b. The support rod is installed on the outer side of the discharge gate rotating shaft. The discharge gate fixing plate is installed on the inner side of the discharge gate fixing plate with bolts. The discharge gate is installed on the inner side of the discharge gate fixing plate. The discharge gate blocks the discharge port of the mixer cylinder. The power device drives the discharge gate rotating shaft to rotate. The discharge gate rotating shaft controls the deflection of the discharge gate through the support rod and the discharge gate fixing plate to control opening and closing.

[0007] Preferably, the opening and closing power device includes a discharge gate switch cylinder, a cylinder seat a, a connecting rod b, and a bearing c. The bearing c is fixedly installed on the surface of the discharge gate fixing flange. The discharge gate rotating shaft passes through the bearing c and provides auxiliary support for the discharge gate rotating shaft. The cylinder seat a is installed on the outer wall of the mixer cylinder body. The bottom end of the discharge gate switch cylinder is hinged to the cylinder seat a. The connecting rod b is installed on the end of the discharge gate rotating shaft. The end of the connecting rod b away from the discharge gate rotating shaft is hinged to the output end of the discharge gate switch cylinder.

[0008] Preferably, the self-locking device includes a self-locking device opening and closing cylinder, a self-locking device rotating shaft, a cylinder seat b, a connecting rod a, a clamping connecting rod, a rotating shaft support a, an adjustable connecting rod, a double-ended adjustable lead screw, a drive connecting rod, and a bearing b. The self-locking device rotating shaft is mounted on the inner wall of the unloading gate fixing flange via the rotating shaft support a. The clamping connecting rod is fixedly installed on the outer wall of the self-locking device rotating shaft. The cylinder seat b is fixedly installed on the outer wall of the mixer cylinder body. The bottom end of the self-locking device opening and closing cylinder is hinged to the cylinder seat b. The bearing a is fixed to the outer wall of the mixer cylinder body. The installation includes a synchronous shaft mounted on the inner side of bearing a, a connecting rod a mounted on the outer side of the synchronous shaft, an output end of the self-locking device opening / closing cylinder hinged to the end of connecting rod a, a bearing b fixedly mounted to the outer wall of the mixer cylinder, an end of the self-locking device rotating shaft passing through bearing b, a drive connecting rod fixedly mounted to the end of the self-locking device rotating shaft, an adjustable connecting rod mounted to the outer wall of the synchronous shaft, and a double-headed adjustable lead screw connecting the ends of the adjustable connecting rod and the drive connecting rod. The positions where the ends of the double-headed adjustable lead screw connect to the adjustable connecting rod and the drive connecting rod are connected by a pin.

[0009] Preferably, the bottom of the mixer cylinder is equipped with a locking device opening and closing sensor contact via a bracket. The locking device opening and closing sensor contact is mounted on the outer side of the end of the self-locking device rotating shaft. The opening and closing sensor contact detects the deflection angle of the self-locking device rotating shaft and controls the working state of the self-locking device according to the deflection angle of the self-locking device rotating shaft. The two locking device opening and closing sensor contacts work together as a group.

[0010] Preferably, the bottom of the mixer cylinder is equipped with a discharge gate switch sensing contact via a bracket. The discharge gate switch sensing contact is mounted on the outer side of the end of the discharge gate rotating shaft. The discharge gate switch sensing contact detects the deflection angle of the discharge gate rotating shaft and controls the working state of the sealing device according to the deflection angle of the discharge gate rotating shaft. Two discharge gate switch sensing contacts work together as a group.

[0011] Preferably, when the self-locking device locks, the rotating shaft of the self-locking device drives the clamping rod to deflect inward, and the clamping rod will be stuck on the outside of the unloading gate fixing plate.

[0012] Compared with the prior art, the present invention provides a large unloading gate device with self-locking, which has the following advantages: 1. This large unloading gate device with self-locking provides auxiliary support to the bottom of the unloading gate through the self-locking device, which improves the pressure resistance when the unloading gate is closed and the ability to withstand vibration of the mixing equipment and material impact, prevents deformation of the unloading gate, improves the stability of equipment use, and extends service life. 2. This large unloading gate device with self-locking uses a hydraulic cylinder to control the opening and closing of the unloading gate, which improves the efficiency and stability of the opening and closing compared to manual operation. 3. The large unloading gate device with self-locking locks the unloading gate after it is closed. If it is necessary to open the unloading gate, the self-locking device needs to be released. This can prevent the unloading gate from being opened directly due to human error and improve the safety of use. 4. In this self-locking large unloading gate device, when the self-locking device is in the locked state, the adjustable connecting rod and the double-headed adjustable screw are in the same straight line. When the pressure from the unloading gate to the self-locking device is transmitted to the double-headed adjustable screw, it will be a thrust along the straight line of the double-headed adjustable screw. The double-headed adjustable screw transmits the thrust to the synchronous shaft along the adjustable connecting rod. The force of the adjustable connecting rod and the double-headed adjustable screw points to the axis of the synchronous shaft, and the pressure of the unloading gate is directly borne by the synchronous shaft without being reduced and transmitted to the opening and closing cylinder. This improves the stability of locking, reduces the pressure received by the opening and closing cylinder, and improves the stability of the locked state. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a large unloading gate device with self-locking according to the present invention; Figure 2 This is a schematic diagram of the opening structure of the self-locking device of the large unloading gate device with self-locking described in this invention; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram showing the opening of the unloading gate structure of the self-locking large unloading gate device described in this invention.

[0014] The markings in the attached diagram are described below: 1. Unloading gate switch cylinder; 2. Self-locking device opening and closing cylinder; 3. Unloading gate rotating shaft; 4. Self-locking device rotating shaft; 5. Unloading gate fixing flange; 6. Unloading gate; 7. Support connecting rod; 8. Unloading gate fixing plate; 9. Mixer cylinder body; 10. Cylinder seat a; 11. Cylinder seat b; 12. Connecting rod a; 13. Bearing a; 14. Pressing connecting rod; 15. Rotating shaft support seat a; 16. Connecting rod b; 17. Adjustable connecting rod; 18. Double-headed adjustable lead screw; 19. Drive connecting rod; 20. Rotating shaft support seat b; 21. Locking device opening and closing sensing contact; 22. Unloading gate opening and closing sensing contact; 23. Bearing b; 24. Bearing c. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1-4 As shown, the present invention provides a large unloading gate device with self-locking, including a mixer cylinder 9 and an unloading gate fixing flange 5. The unloading gate fixing flange 5 is fixedly installed at the bottom of the mixer cylinder 9. A sealing device is installed inside the unloading gate fixing flange 5. A self-locking device is provided on the side of the sealing device. After the sealing device performs the sealing action, the self-locking device locks the sealing device, thereby improving the sealing stability. The sealing device includes a discharge gate rotating shaft 3, a discharge gate 6, a support rod 7, a discharge gate fixing plate 8, and an opening and closing power device. The discharge gate rotating shaft 3 is mounted on the inner wall of the discharge gate fixing flange 5 via a rotating shaft support seat b 20. The support rod 7 is installed on the outer side of the discharge gate rotating shaft 3. The discharge gate fixing plate 8 is installed with bolts to the support rod 7. The discharge gate 6 is installed on the inner side of the discharge gate fixing plate 8. The discharge gate 6 seals the discharge port of the mixer cylinder 9. The power device drives the discharge gate rotating shaft 3 to rotate. The discharge gate rotating shaft 3 controls the deflection of the discharge gate 6 through the support rod 7 and the discharge gate fixing plate 8 to control opening and closing. The discharge gate 6 rotates and fits against the discharge port at the bottom of the mixer cylinder 9 to perform the sealing action. After the discharge gate 6 deflects downward, the seal is opened to discharge material.

[0017] The opening and closing power device includes a discharge gate switch cylinder 1, a cylinder seat a 10, a connecting rod b 16, and a bearing c 24. The bearing c 24 is fixedly installed on the surface of the discharge gate fixing flange 5. The discharge gate rotating shaft 3 passes through the bearing c 24 and provides auxiliary support for the discharge gate rotating shaft 3. The cylinder seat a 10 is installed on the outer wall of the mixer cylinder 9. The bottom end of the discharge gate switch cylinder 1 is hinged to the cylinder seat a 10. The connecting rod b 16 is installed on the end of the discharge gate rotating shaft 3. The end of the connecting rod b 16 away from the discharge gate rotating shaft 3 is hinged to the output end of the discharge gate switch cylinder 1. When the discharge gate switch cylinder 1 extends, it drives the discharge gate rotating shaft 3 to rotate through the connecting rod b 16.

[0018] The self-locking device includes a self-locking opening / closing cylinder 2, a self-locking rotating shaft 4, a cylinder seat b 11, a connecting rod a 12, a clamping connecting rod 14, a rotating shaft support a 15, an adjustable connecting rod 17, a double-ended adjustable lead screw 18, a drive connecting rod 19, and a bearing b 23. The self-locking rotating shaft 4 is mounted on the inner wall of the unloading gate fixing flange 5 via the rotating shaft support a 15. The clamping connecting rod 14 is fixedly mounted to the outer wall of the self-locking rotating shaft 4. The cylinder seat b 11 is fixedly mounted to the outer wall of the mixer cylinder 9. The bottom end of the self-locking opening / closing cylinder 2 is hinged to the cylinder seat b 11. The bearing a 13 is fixedly mounted to the outer wall of the mixer cylinder 9. A synchronous shaft is mounted on the inner side of the bearing a 13. The connecting rod a 12 is mounted on the outer side of the synchronous shaft. The output end of the self-locking opening / closing cylinder 2 is hinged to the end of the connecting rod a 12. The bearing b 23... 23 is fixedly installed on the outer wall of the mixer cylinder 9. The end of the self-locking device rotating shaft 4 passes through bearing b 23. The drive connecting rod 19 is fixedly installed on the end of the self-locking device rotating shaft 4. The adjustable connecting rod 17 is installed on the outer wall of the synchronous shaft. The double-headed adjustable lead screw 18 connects the ends of the adjustable connecting rod 17 and the drive connecting rod 19. The connection between the end of the double-headed adjustable lead screw 18 and the adjustable connecting rod 17 and the drive connecting rod 19 is made by a pin. When self-locking is required, the self-locking device opening and closing cylinder 2 is activated by connecting rod a. 12 drives the synchronous shaft to deflect, which in turn drives the adjustable connecting rod 17 to deflect. When the adjustable connecting rod 17 deflects, it pulls the drive connecting rod 19 to deflect via the double-headed adjustable lead screw 18. When the drive connecting rod 19 deflects, it drives the self-locking device rotating shaft 4 to deflect. The deflection of the self-locking device rotating shaft 4 will drive the pressing connecting rod 14 to deflect, causing the pressing connecting rod 14 to move away from the bottom of the unloading gate fixing plate 8, releasing the restriction on the unloading gate 6, thereby allowing the unloading gate 6 to open. When the self-locking device is in the locked state, the adjustable connecting rod 17 and the double-headed adjustable lead screw 18 are on the same straight line. At this time, the pressure of the unloading gate 6 acting on the self-locking device will be transmitted to the double-headed adjustable lead screw 18 along the straight line of the double-headed adjustable lead screw 18, and further transmitted to the synchronous shaft through the adjustable connecting rod 17. The synchronous shaft directly bears the pressure of the unloading gate 6, instead of transmitting the force to the opening and closing cylinder 2, which improves the stability of locking and reduces the pressure received by the opening and closing cylinder 2.

[0019] The bottom of the mixer cylinder 9 is equipped with a locking device opening and closing sensing contact 21 via a bracket. The locking device opening and closing sensing contact 21 is mounted on the outer side of the end of the self-locking device rotating shaft 4. The locking device opening and closing sensing contact 21 detects the deflection angle of the self-locking device rotating shaft 4 and controls the working state of the self-locking device according to the deflection angle of the self-locking device rotating shaft 4. The two locking device opening and closing sensing contacts 21 work in pairs. The two locking device opening and closing sensing contacts 21 are mounted in different directions of the self-locking device rotating shaft 4. When the self-locking device rotating shaft 4 rotates, the two locking device opening and closing sensing contacts 21 work together to sense the rotation angle of the self-locking device rotating shaft 4. The two locking device opening and closing sensing contacts 21 correspond to the self-locking working position and the self-locking releasing working position of the self-locking device, respectively. After the self-locking device rotating shaft 4 deflects to the specified angle, the corresponding locking device opening and closing sensing contact 21 triggers a signal to control the self-locking device opening and closing cylinder 2 to stop working.

[0020] The bottom of the mixer cylinder 9 is equipped with a discharge gate switch sensing contact 22 via a bracket. The discharge gate switch sensing contact 22 is mounted on the outer side of the end of the discharge gate rotating shaft 3. The discharge gate switch sensing contact 22 detects the deflection angle of the discharge gate rotating shaft 3 and controls the working state of the sealing device according to the deflection angle of the discharge gate rotating shaft 3. Two discharge gate switch sensing contacts 22 work together as a group. The working principle of the discharge gate switch sensing contact 22 is the same as the working principle of the locking device opening and closing sensing contact 21.

[0021] When the self-locking device locks, the rotating shaft 4 of the self-locking device drives the clamping rod 14 to deflect inward. The clamping rod 14 will be stuck on the outside of the unloading gate fixing plate 8. The clamping rod 14 supports the unloading gate fixing plate 8, thereby supporting the side of the unloading gate 6 away from the supporting rod 7, and improving the stability of the unloading gate 6 when it is closed.

[0022] When it is necessary to open the unloading gate 6, first control the self-locking device opening and closing cylinder 2 to retract. The self-locking device opening and closing cylinder 2 drives the synchronous shaft to rotate through connecting rod a 12. The synchronous shaft drives the adjustable connecting rod 17 to deflect. When the adjustable connecting rod 17 deflects, it drives the drive connecting rod 19 to rotate through the double-headed adjustable lead screw 18. The drive connecting rod 19 drives the self-locking device rotating shaft 4 to rotate. The self-locking device rotating shaft 4 drives the pressing connecting rod 14 to rotate, so that the pressing connecting rod 14 releases the support of the unloading gate fixing plate 8. Then control the unloading gate opening and closing cylinder 1 to retract. The unloading gate opening and closing cylinder 1 drives the self-locking device rotating shaft 4 to rotate through connecting rod b 16 drives the discharge gate rotating shaft 3 to rotate, which in turn drives the support connecting rod 7 to deflect. The support connecting rod 7, through the discharge gate fixing plate 8, drives the discharge gate 6 to deflect, causing the discharge gate 6 to move away from the discharge port at the bottom of the mixer cylinder 9, thus performing the discharge action. After the discharge is completed, the discharge gate opening and closing cylinder 1 is controlled to extend. The discharge gate opening and closing cylinder 1, through connecting rod b 16, drives the discharge gate rotating shaft 3 to deflect. The discharge gate rotating shaft 3, through the support connecting rod 7 and the discharge gate fixing plate 8, drives the discharge gate 6 to rotate to the bottom of the mixer cylinder 9 to block the discharge port. Then, the self-locking device opening and closing cylinder 2 is controlled to extend. The self-locking device opening and closing cylinder 2, through connecting rod a 12 drives the synchronous shaft to rotate, and causes the adjustable connecting rod 17 to rotate. In cooperation with the double-headed adjustable lead screw 18, the driving connecting rod 19 is driven to rotate. The driving connecting rod 19 drives the self-locking device rotating shaft 4 to rotate. The self-locking device rotating shaft 4 drives the pressing connecting rod 14 to rotate. The pressing connecting rod 14 deflects to the bottom of the unloading gate fixing plate 8, and supports and locks the bottom of the unloading gate fixing plate 8.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large unloading gate device with self-locking, comprising a mixer cylinder (9) and a unloading gate fixing flange (5), characterized in that: The unloading gate fixing flange (5) is fixedly installed at the bottom of the mixer cylinder (9). A sealing device is installed inside the unloading gate fixing flange (5), and a self-locking device is provided on the side of the sealing device. The sealing device includes a discharge gate rotating shaft (3), a discharge gate (6), a support rod (7), a discharge gate fixing plate (8), and an opening and closing power device. The discharge gate rotating shaft (3) is mounted on the inner wall of the discharge gate fixing flange (5) through a rotating shaft support seat b (20). The support rod (7) is installed on the outer side of the discharge gate rotating shaft (3). The discharge gate fixing plate (8) is installed with the support rod (7) by bolts. The discharge gate (6) is installed on the inner side of the discharge gate fixing plate (8).

2. The self-locking large unloading gate device according to claim 1, characterized in that: The opening and closing power device includes a discharge gate switch cylinder (1), a cylinder seat a (10), a connecting rod b (16) and a bearing c (24). The bearing c (24) is fixedly installed on the surface of the discharge gate fixing flange (5). The discharge gate rotating shaft (3) passes through the bearing c (24) and provides auxiliary support for the discharge gate rotating shaft (3) through the bearing c (24).

3. The self-locking large unloading gate device according to claim 2, characterized in that: The cylinder seat a (10) is installed on the outer wall of the mixer cylinder (9), the bottom end of the discharge gate switch cylinder (1) is hinged to the cylinder seat a (10), the connecting rod b (16) is installed on the end of the discharge gate rotating shaft (3), and the end of the connecting rod b (16) away from the discharge gate rotating shaft (3) is hinged to the output end of the discharge gate switch cylinder (1).

4. The self-locking large unloading gate device according to claim 1, characterized in that: The discharge port of the mixer cylinder (9) is blocked by the discharge gate (6). The discharge gate rotating shaft (3) is driven to rotate by the opening and closing power device. The discharge gate rotating shaft (3) controls the discharge gate (6) to deflect through the support connecting rod (7) and the discharge gate fixing plate (8) to control the opening and closing.

5. A large unloading gate device with self-locking according to claim 1, characterized in that: The self-locking device includes a self-locking device opening and closing cylinder (2), a self-locking device rotating shaft (4), a cylinder seat b (11), a connecting rod a (12), a pressing connecting rod (14), a rotating shaft support seat a (15), an adjustable connecting rod (17), a double-headed adjustable lead screw (18), a drive connecting rod (19), and a bearing b (23). The self-locking device rotating shaft (4) is mounted on the inner wall of the unloading gate fixing flange (5) through the rotating shaft support seat a (15). The pressing connecting rod (14) is fixedly installed on the outer wall of the self-locking device rotating shaft (4).

6. A large unloading gate device with self-locking according to claim 5, characterized in that: The cylinder seat b (11) is fixedly installed on the outer wall of the mixer cylinder (9). The bottom end of the self-locking device opening and closing cylinder (2) is hinged to the cylinder seat b (11). The bearing a (13) is fixedly installed on the outer wall of the mixer cylinder (9). A synchronous shaft is installed on the inner side of the bearing a (13). The connecting rod a (12) is installed on the outer side of the synchronous shaft. The output end of the self-locking device opening and closing cylinder (2) is hinged to the end of the connecting rod a (12).

7. A large unloading gate device with self-locking according to claim 6, characterized in that: The bearing b (23) is fixedly installed on the outer wall of the mixer cylinder (9). The end of the self-locking device rotating shaft (4) passes through the bearing b (23). The drive connecting rod (19) is fixedly installed on the end of the self-locking device rotating shaft (4). The adjustable connecting rod (17) is installed on the outer wall of the synchronous shaft. The double-headed adjustable screw (18) connects the ends of the adjustable connecting rod (17) and the drive connecting rod (19) through a transmission. The position where the end of the double-headed adjustable screw (18) is connected to the adjustable connecting rod (17) and the drive connecting rod (19) is connected by a pin.

8. A large unloading gate device with self-locking according to claim 1, characterized in that: The bottom of the mixer cylinder (9) is equipped with a locking device opening and closing sensor contact (21) via a bracket. The locking device opening and closing sensor contact (21) is mounted on the outside of the end of the self-locking device rotating shaft (4). The locking device opening and closing sensor contact (21) detects the deflection angle of the self-locking device rotating shaft (4) and controls the working state of the self-locking device according to the deflection angle of the self-locking device rotating shaft (4). The two locking device opening and closing sensor contacts (21) work together as a group.

9. A large unloading gate device with self-locking according to claim 1, characterized in that: The bottom of the mixer cylinder (9) is equipped with a discharge gate switch sensing contact (22) via a bracket. The discharge gate switch sensing contact (22) is mounted on the outside of the end of the discharge gate rotating shaft (3). The discharge gate switch sensing contact (22) detects the deflection angle of the discharge gate rotating shaft (3) and controls the working state of the sealing device according to the deflection angle of the discharge gate rotating shaft (3). The two discharge gate switch sensing contacts (22) work together as a group.

10. A large unloading gate device with self-locking according to claim 5, characterized in that: When the self-locking device is locked, the self-locking device rotating shaft (4) drives the pressing rod (14) to deflect inward, and the pressing rod (14) will be stuck on the outside of the unloading gate fixing plate (8).

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